Address Resolution: MAC and IP Addresses

What protocol is used to associate an IPv6 address with a MAC address?

ICMPv6

What is the purpose of ARP in an IPv4 network?

To map IPv4 addresses to MAC addresses

What address is used in a frame when the destination host is on another network?

Default gateway address

What is contained in an Ethernet Layer 2 frame?

Source and destination MAC addresses Signup and view all the answers

What is necessary for a host to send a packet to another host on the same network?

Both IPv4 address and MAC address Signup and view all the answers

What is used to resolve device names to IPv4 addresses?

DNS Signup and view all the answers

What is the purpose of ARP in resolving MAC addresses?

To map IPv4 addresses to MAC addresses Signup and view all the answers

On which network is ARP not necessary?

IPv6 network Signup and view all the answers

What is the purpose of a Layer 2 physical address?

Used for NIC to NIC communications on the same Ethernet network Signup and view all the answers

What is the destination MAC address when the destination IP address is on a remote network?

That of the default gateway Signup and view all the answers

What does a router examine to determine the best path for forwarding the IPv4 packet?

The destination IPv4 address Signup and view all the answers

What is the purpose of ARP?

To associate the IPv4 address of a device with the MAC address of the device NIC Signup and view all the answers

What is the primary purpose of ARP?

Resolving IPv4 addresses to MAC addresses Signup and view all the answers

What is Layer 3 logical address used for?

Used to send the packet from the source device to the destination device Signup and view all the answers

What happens to the Layer 2 information when a router receives the Ethernet frame?

It is de-encapsulated Signup and view all the answers

Where is the ARP table stored?

In RAM Signup and view all the answers

What happens if a device cannot find an IPv4 address in the ARP table?

The device sends an ARP request Signup and view all the answers

What is the purpose of a default gateway?

To forward packets to a remote network Signup and view all the answers

What is the destination MAC address when the destination IP address is on the same network?

That of the destination device Signup and view all the answers

What is the relationship between an IPv4 address and a MAC address called?

Map Signup and view all the answers

When sending a frame, what does a device search for in the ARP table?

The IPv4 address and MAC address Signup and view all the answers

Where does a device search for the IPv4 address if the packet is sent to a different network?

ARP table for the default gateway Signup and view all the answers

What is an ARP table entry?

A map of IPv4 address to MAC address Signup and view all the answers

Why does a device use the ARP table?

To send a frame Signup and view all the answers

What is the primary function of the ARP table?

To temporarily cache the mapping of devices on the LAN Signup and view all the answers

What happens to ARP table entries after a specified period of time?

They are removed when the ARP cache timer expires Signup and view all the answers

What is the command to display the ARP table on a Cisco router?

show ip arp Signup and view all the answers

What is the purpose of ARP broadcasting?

To send ARP requests to every device on the local network Signup and view all the answers

What is the potential consequence of excessive ARP broadcasts?

Some reduction in performance Signup and view all the answers

What is ARP spoofing used for?

To reply to ARP requests for an IPv4 address belonging to another device Signup and view all the answers

What is the result of ARP poisoning?

The threat actor sends an ARP reply with its own MAC address Signup and view all the answers

What is the command to display the ARP table on a Windows 10 PC?

arp -a Signup and view all the answers

What is the primary function of dynamic ARP inspection in enterprise-level switches?

To protect against ARP attacks Signup and view all the answers

What protocol is used to match IPv6 addresses to MAC addresses in a network?

IPv6 Neighbor Discovery Signup and view all the answers

What is the purpose of ICMPv6 Neighbor Solicitation messages?

To perform address resolution Signup and view all the answers

What is the purpose of ICMPv6 Redirect messages?

To select a better next-hop router Signup and view all the answers

What is the purpose of IPv6 Neighbor Discovery protocol?

To provide router discovery and redirection services Signup and view all the answers